package com.antunnel.common.util;    

import java.beans.IntrospectionException;  
    import java.beans.Introspector;  
    import java.beans.PropertyDescriptor;  
    import java.math.BigDecimal;  
    import java.math.BigInteger;  
    import java.util.List;  
    import java.util.Map;  
    import java.util.Set;  
    
    public class JSONUtils_zs  
    {  
        /** Commons Logging instance. */  
        private static org.apache.commons.logging.Log log =  
            org.apache.commons.logging.LogFactory.getLog(JSONUtils_zs.class);  
        /** 
         * @param obj 任意对象 
         * @return String 
         */  
        public static String object2json(Object obj) {  
            StringBuilder json = new StringBuilder();  
            if (obj == null) {  
                json.append("\"\"");  
            } else if (obj instanceof String || obj instanceof Integer || obj instanceof Float   
                    || obj instanceof Boolean || obj instanceof Short || obj instanceof Double   
                    || obj instanceof Long || obj instanceof BigDecimal  
                    || obj instanceof BigInteger || obj instanceof Byte) {  
                json.append("\"").append(string2json(obj.toString())).append("\"");  
            } else if (obj instanceof Object[]) {  
                json.append(array2json((Object[]) obj));  
            } else if (obj instanceof List) {  
                json.append(list2json((List<?>) obj));  
            } else if (obj instanceof Map) {  
                json.append(map2json((Map<?, ?>) obj));  
            } else if (obj instanceof Set) {  
                json.append(set2json((Set<?>) obj));  
            } else {  
                json.append(bean2json(obj));  
            }  
            return json.toString();  
        }  
        /** 
         * @param bean bean对象 
         * @return String 
         */  
        public static String bean2json(Object bean) {  
            StringBuilder json = new StringBuilder();  
            json.append("{");  
            PropertyDescriptor[] props = null;  
            try {  
                props = Introspector.getBeanInfo  
                    (bean.getClass(), Object.class).getPropertyDescriptors();  
            } catch (IntrospectionException e) {  
                e.printStackTrace();  
            }  
            if (props != null) {  
                for (int i = 0; i < props.length; i++) {  
                    try {  
                        String name = object2json(props[i].getName());  
                        String value = object2json(props[i].getReadMethod().invoke(bean));  
                        json.append(name);  
                        json.append(":");  
                        json.append(value);  
                        json.append(",");  
                    } catch (Exception e) {  
                        e.printStackTrace();  
                    }  
                }  
                json.setCharAt(json.length() - 1, '}');  
            } else {  
                json.append("}");  
            }  
            return json.toString();  
        }  
        /** 
         * @param list list对象 
         * @return String 
         */  
        public static String list2json(List<?> list) {  
            StringBuilder json = new StringBuilder();  
            json.append("[");  
            if (list != null && list.size() > 0) {  
                for (Object obj : list) {  
                    json.append(object2json(obj));  
                    json.append(",");  
                }  
                json.setCharAt(json.length() - 1, ']');  
            } else {  
                json.append("]");  
            }  
            return json.toString();  
        }  
        /** 
         * @param array 对象数组 
         * @return String 
         */  
        public static String array2json(Object[] array) {  
            StringBuilder json = new StringBuilder();  
            json.append("[");  
            if (array != null && array.length > 0) {  
                for (Object obj : array) {  
                    json.append(object2json(obj));  
                    json.append(",");  
                }  
                json.setCharAt(json.length() - 1, ']');  
            } else {  
                json.append("]");  
            }  
            return json.toString();  
        }  
        /** 
         * @param map map对象 
         * @return String 
         */  
        public static String map2json(Map<?, ?> map) {  
            StringBuilder json = new StringBuilder();  
            json.append("{");  
            if (map != null && map.size() > 0) {  
                for (Object key : map.keySet()) {  
                    json.append(object2json(key));  
                    json.append(":");  
                    json.append(object2json(map.get(key)));  
                    json.append(",");  
                }  
                json.setCharAt(json.length() - 1, '}');  
            } else {  
                json.append("}");  
            }  
            return json.toString();  
        }  
        /** 
         * @param set 集合对象 
         * @return String 
         */  
        public static String set2json(Set<?> set) {  
            StringBuilder json = new StringBuilder();  
            json.append("[");  
            if (set != null && set.size() > 0) {  
                for (Object obj : set) {  
                    json.append(object2json(obj));  
                    json.append(",");  
                }  
                json.setCharAt(json.length() - 1, ']');  
            } else {  
                json.append("]");  
            }  
            return json.toString();  
        }  
        /** 
         * @param s 参数 
         * @return String 
         */  
        public static String string2json(String s) {  
            if (null == s){  
                return "";  
            }  
            StringBuilder sb = new StringBuilder();  
            for (int i = 0; i < s.length(); i++) {  
                char ch = s.charAt(i);  
                switch (ch) {  
                case '"':  
                    sb.append("\\\"");  
                    break;  
                case '\\':  
                    sb.append("\\\\");  
                    break;  
                case '\b':  
                    sb.append("\\b");  
                    break;  
                case '\f':  
                    sb.append("\\f");  
                    break;  
                case '\n':  
                    sb.append("\\n");  
                    break;  
                case '\r':  
                    sb.append("\\r");  
                    break;  
                case '\t':  
                    sb.append("\\t");  
                    break;  
                case '/':  
                    sb.append("\\/");  
                    break;  
                default:  
                    if (ch >= '\u0000' && ch <= '\u001F') {  
                        String ss = Integer.toHexString(ch);  
                        sb.append("\\u");  
                        for (int k = 0; k < 4 - ss.length(); k++) {  
                            sb.append('0');  
                        }  
                        sb.append(ss.toUpperCase());  
                    } else {  
                        sb.append(ch);  
                    }  
                }  
            }  
            return sb.toString();  
        }  
    }   